Hydrolysis and precipitation of polyacrylamides in hard brines at elevated temperatures
Journal Article
·
· SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States)
Laboratory data are used to show that commercial polyacrylamides hydrolyze to an equilibrium degree that depends on the temperature of hydrolysis but is largely independent of the brine composition. At greater than 20 ppm hardness levels, polyacrylamide solutions pass through a sharp cloud point as their temperature is raised. This cloud-point temperature depends primarily on the hardness level of the brine and the degree of hydrolysis of the polymer, with lesser dependency on polymer molecular weight and polymer concentration. Indications are that these cloudy solutions cause plugging of porous media. Therefore, a polymer solution is potentially useful only below its cloud-point temperature. For application in a given reservoir, the temperature and frequently the hardness of the water are fixed. If a polyacrylamide hydrolyzes at reservoir conditions to where its cloud point in the field water falls below the reservoir temperature, it is not suitable for polymer flooding in that reservoir.
- Research Organization:
- Phillips Petroleum Co.
- OSTI ID:
- 6591688
- Journal Information:
- SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States) Vol. 2:2; ISSN SREEE
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stability of polyacrylamides in hard brines at elevated temperatures
Effect of hydrolysis of polyacrylamide on solution viscosity, polymer retention and flow resistance properties
Mechanism of polyacrylamide gel syneresis determined by C-13 NMR
Conference
·
Sat Sep 01 00:00:00 EDT 1984
· Soc. Pet. Eng. AIME, Pap.; (United States)
·
OSTI ID:6394949
Effect of hydrolysis of polyacrylamide on solution viscosity, polymer retention and flow resistance properties
Conference
·
Tue Dec 31 23:00:00 EST 1974
· Soc. Pet. Eng. AIME, Pap.; (United States)
·
OSTI ID:6637035
Mechanism of polyacrylamide gel syneresis determined by C-13 NMR
Conference
·
Fri Dec 31 23:00:00 EST 1982
· Soc. Pet. Eng. AIME, Pap.; (United States)
·
OSTI ID:6249099
Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
BENCH-SCALE EXPERIMENTS
BRINES
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
ENHANCED RECOVERY
EQUILIBRIUM
FLUID INJECTION
FOSSIL FUELS
FUELS
HYDROLYSIS
LYSIS
MEDIUM TEMPERATURE
MOLECULAR WEIGHT
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROLEUM
PLUGGING
POLYAMIDES
POLYMERS
POROSITY
PRECIPITATION
QUANTITY RATIO
RECOVERY
SEPARATION PROCESSES
SOLVOLYSIS
STIMULATION
TEMPERATURE DEPENDENCE
WATERFLOODING
WELL STIMULATION
WELLS
020300* -- Petroleum-- Drilling & Production
ADDITIVES
BENCH-SCALE EXPERIMENTS
BRINES
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
ENHANCED RECOVERY
EQUILIBRIUM
FLUID INJECTION
FOSSIL FUELS
FUELS
HYDROLYSIS
LYSIS
MEDIUM TEMPERATURE
MOLECULAR WEIGHT
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROLEUM
PLUGGING
POLYAMIDES
POLYMERS
POROSITY
PRECIPITATION
QUANTITY RATIO
RECOVERY
SEPARATION PROCESSES
SOLVOLYSIS
STIMULATION
TEMPERATURE DEPENDENCE
WATERFLOODING
WELL STIMULATION
WELLS